油浸式电流互感器不同故障原因试验分析  

Test analysis of different causes of oil-immersed current transformers

作　　者：张泽强 彭阳 ZHANG Zeqiang;PENG Yang(State Grid Xinjiang Electric Power Co.,Ltd.Hami Power Supply Company,Hami Xinjiang 839000,China)

机构地区：[1]国网新疆电力有限公司哈密供电公司,新疆哈密839000

出　　处：《自动化与仪器仪表》2020年第11期157-159,共3页Automation & Instrumentation

基　　金：国家电网公司科技项目(No.PD72-17-006)。

摘　　要：针对两个不同参数的油浸式电流互感器进行试验测试分析,主要从不同故障原因进行分析,研究了一定负载下发热老化故障和绝缘故障情况。在额定负载循环情况下,CT1和CT2在1.75倍额定负载下达到的最高温度,CT1明显高于CT2,随着温度的升高,它的加速老化因子数值也在增加。在正常使用一段时间后,采用频率电介质光谱仪对两种互感器进行绝缘分析,低于100 Hz情况下,CT1主绝缘的损耗因子远高于CT2。这种差异可能是由于CT1的主绝缘因老化或水分摄入而严重受潮,CT2可能处于正常老化状态。In this paper,two different parameters of oil-immersed current transformers were tested and analyzed.The main analysis was from different fault causes.The thermal aging fault and insulation fault under a certain load were studied.Under the condition of rated load cycle,CT1 and CT2 reached the highest temperature at 1.75 times the rated load,CT1 is significantly higher than CT2.As the temperature increased,the value of its accelerated aging factor also increased.After a period of normal cycle,the frequency dielectric spectrometer was used to analyse two types of current transformers,below 100Hz,the loss factor of CT1 main insulation was much higher than CT2.This difference may be due to the main insulation of CT1 being seriously wet due to aging or water intake,and CT2 may be in a normal aging state.

关 键 词：油浸式电流互感器 试验分析 负载循环 老化故障 绝缘分析 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]